To mapsjanhere
Both Linder and Sauer & Son were in Suhl, Germany. There is a crossed "something" on the bottom of one of the barrels. It looks (under a magnifying glass) like possibly crossed knives, but perhaps pistols. The mark is small and just viewing it with the naked eye, it looks like an X. Is this what you mean? I have also heard that the crossed knives were a Linder trade-mark. So I'm a little confused. Thanks for your help.